(I) Resistivity
This is. Measure of the property of a material by which it impedes the flow of electric current through it. It is measured in term of the electrical resistance between the opposite faces of a unit cube of the material.
(I) Conductivity
This is the reciprocal of resistivity ,and is a measure of the ease with which electric current may flow through a material. If the resistivity of a material is low, it's conductivity will be high.